Grinding-machine.



. B. ROSS.

GRINDING MACHINE.

APPLICATION FILED APR- I. I9I6.

Patented June 12, 1917.

wwzao 2 SHEETS-SHEET 1 INI/EAITOH I Hang 5. Foss v By ATTORNEY WIT/V588a P H. B. ROSS.

GRINDING MACHINE.

APPLICATION FILED APR. 1, 1916.

1329,5136. Patented J1111e12, 1917.

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HARRY B. ROSS, OF SEATTLE, "WASHINGTON, ASSIGNOR TO PHILBRIGK CUTTERHEAD COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented June 12, 1917.

Application filed April 1, 1916. Serial No. 88,210.

To all whom it may concern:

Be it known that I, HARRY 13. Ross, a citizen of the United States,residing at Seattle, in the county of King and State of l/Vashington,have invented certain new and useful Improvements in Grinding-Machines,of which the following is a specification.

This invention relates to grinding machines and, more especially, togrinders for sharpening and jointing the bits and knives of cutter-headsfor wood-planing machines.

The object of my improvements is to provide a simple and eflicientgrinding machine of this character and in which the grinding wheel andthe work are adapted to be adjusted to properly and uniformly grind bitsor knives of different sizes and shapes and without the necessity ofemploying skilled labor.

The invention consists in the novel con struction, adaptation andcombination of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a plan view of a grindingmachine embodying my invention. Fig. 2 is a front elevation and Fig. 3is an end elevation of the same with a portion of the supporting frameand the work shown in different positions from which it is representedin Fig. 1. Fig. 1 is a sectional view through 4r4: of Fig. 1. Fig. 5 isa similar view through 55 of Fig. 2. Fig. 6 is a detail of the lower endof the screw for regulating the relative height of the grinder wheel andits connection with the sliding shoe which is shown in transversevertical. section. Fig. 7 is an end elevation of the work-holding turretwith the gaging attachments thereon. Fig. 8 is a fragmentary endelevation of the machine adapted for jointing bits having curved cuttingedges.

Referring to the drawings, the numeral 110 designates the frame or baseof the machine which, as illustrated, is supported upon a stand 11. Saidbase is provided with ways 12 for bar slides 13 and 13 secured to theunderside of a carriage 14.. The slide 13 is formed with rack teeth 13engageable with peripheral teeth 15 provided on a stub shaft 15 which,as shown in Fig. 5, is journaled in bearings and 10 of the base andhaving a hand wheel by the turning of which transverse motion may beimparted to the carriage.

At one of its ends, said base is provided with upwardly extendingstandards 16 and 16 and at the rear and adjacent to its other end thebase is provided with a bracket 17 which extends to a distance above thecarriage 14E.

Extending through a bore provided in standard 16 and through a bushing18 seated in a bore of the other standard 16 is a horizontal shaft 19which also extends through and is rigidly secured to lugs 20 provided atone side of a movable frame 21, as by set screws 22.

At the opposite side from the lugs 20, frame 21 has a lug 28 which isprovided with a screw-threaded aperture in which engages the thread of asubstantially upright screw 24 having at its upper end a handwheel 24-for rotating, the same, and at its lower end has a globular extremity24: which fits into a corresponding socket 25 (Fig. 6) of a shoe 25 tomake a ball-andsocket joint therewith. As shown in Figs. 2 and 3, theshoe 25 is supported upon a bar 26 which is pivotally connected at itsforward end by a pin 27 and has an adjustment screw 26 extending throughits other end and bearing against a shelf portion 17 of the bracket 17.

Journaled in bearings, indicated by 28, in said frame, is a horizontalspindle 29 which carries at its forward end a grinding wheel 30 andbetween its bearings the spindle is formed with a relatively largediameter to serve as a pulley for a power belt 31 whereby the spindle isrotated to drive the grinding wheel. The aforesaid bushing 18 is formedwith a transversely arranged bearing 18 for a shaft 32 provided withperipheral teeth 82 (Fig. 4) to engage rack teeth 19 provided in theshaft 19 and having a hand wheel 82 whereby the shaft 32 may be rotatedto afford forward or rearward movements to the frame 21 for adjustingthe horizontal position of the grinding wheel.

The elevation of the grinding wheel is adjusted by tilting the frameabout the axis of the shaft 19 at one side of the frame by means of thescrew 24: at the other side thereof.

Rotatably mounted on the carriage 1-4:, as by a king-pin 33 is a turrethaving immediately above the carriage a disk 33 which is provided in itsperiphery with series of spur-gear teeth 34, as best shown in Figs. 1and 7 Extending upwardly from the disk at a distance from the axisthereof is a post 35 which is surmounted by a tubular boss 35 in whichis journaled a horizontally disposed arbor 36. This arbor is provided atone end with a pulley 36 which, upon occasion, may be swung by turningthe turret into the position shown in Figs. 1 and 8, to engage the belt31 for rotating the arbor.

The part of the arbor at the opposite side of the turret post from thepulley 36 is machined to fit into'the hub recess of a 'cutter head Hwhose bits are to be ground. Said head is detachably secured to thearbor, as by means (not shown) such as the ordinary clamping devicesobtaining in cut ter-heads for securing the same to their spindles ofplaning machines.

To present the head at various angles to the grinding. wheel, the turretis turned by the operator to approximately the proper position, thentemporarily secured and finally adjusted by means of the followingdescribed devices.

Such devices consist of a rack-block 37 whose teeth are normally causedto be engaged with a selected series of teeth 3st of the turret by meansof a headed rod 38 be ing urged against the block by means of a spring,indicated by broken lines 39 in Fig.

1. Said spring and the rod 38 are housed in a casing 40 which is rigidwith the carriage and is provided with a protruding ward 40 betweenwhich and the carriage is provided a space to accommodate the rackblock.

ll represents a rod extending across the carriage and through anaperture provided in the block 37, the latter being secured be tween ashoulder 411 of the rod and interlocked nuts 42 engaged on ascrew-threaded portion 41 of the rod. This screw part of the rod alsoengages in a screw-threaded hole provided in a nut 43 having a stem 43which serves as the fulcrum for the rod 11 when the same is to be usedas a lever to withdraw the rack-block 37 from its engagement with theteeth of the turret-disk in opposition to the power of the spring 39.

VVhenthe rack-block is engaged with the turret-teeth, then by rotatingsaid rod, the

screw-part thereof acting in the nut 43 will cause the rod and the blockto be moved to ward or from the back of the carriage to accordinglyaffect the turret for adjusting the rotary position thereof.

The illustrated head H is provided, as shown in Figs. 1 2 and 3, withcircular bits C and with the so-called jointing bits S, or knives, asthey will be hereinafter designated. The grinding wheel 30 is utilizedto sharpen both the bits and the knives and also to oint the latter.

To sharpen the knives S, theturret is adjusted to have the axis of thehead disposed. parallel relative to the direction of travel of thecarriage, as shown in Figs. Q or 3, or

nearly so; then advancing and tilting the I frame 21, as beforeexplained, to bring the grindlng wheel into position, such as indlcated'by broken lines 30 (Fig. 3) to sharpen the cutting edge of a knifebrought To properly set and adjustably hold the I knives into positionsto be ground, I employ a gage finger 4E5 which'extends diametricallythrough a rod 46 which, in turn, extends through a boss 47 provided onan arm 47 of a quadrant 47 which is rotatable about the axis of arbor36;

The quadrant 47 is provided with an arcuate slot 48 (Fig. 7 disposedconcentrically of the arbor axis to accommodate a bolt 49 by which thequadrant is adjustably secured to the turret post. The rod 46 has rigidtherewith a collar 46 which is seated in a transversely'arranged slot 50of the boss 17 and of greater depth than the thickness of the collar toafford a limited amount of oscillatory motion with the rod as about theaxis of the same.

A helical spring 51 is connected at one of its ends to an end 46 of thecollar and has its other end connected to a stud 52 secured to the post.The function of said spring is to yieldingly hold the gage finger 45against the periphery of the head andagainst a knife S and serve as astop to prevent the head being accidentally turned when such knife isbeing sharpened.

After one of the knives is thussharpened, the grinding wheel istemporarily raised and the head turned to bring another knife intogrinding position when held against the finger for sharpening.

Inturning the head, the spring 51 yields to allow the protrudingportions of the knives to pass beneathpthe finger and after thus passingfor a short distance therebeyond, the head is turned in a contrarydirection to carry the referred-to knife back againstthe finger.-

When the knives are inclined oppositely from that shown in the drawing,as in alefthand head, the rod 4L6 is retracted axially to withdraw thecollar 16 from the slot 50 and is thereupon turned to transposethespring-connected end of the collar to the opposite end of the slot, andthen advancing the rod to restore the collar into the slot.

The circular bits C are sharpened by the grinding wheel 30 but arejointed by independent devices consisting of emery stones 53 and 54 heldin notches provided in a bar by means of a clamping plate 56. The bar 55is movable in a guide 57 depending from the frame 21 and held inselected positions by means of a set screw 58.

The stone 53 which is used for jointing circular bits intended forcutting grooves in flooring, or the like, is arranged in approximatelyrectangular relations to the axis of the bar 55. The other stones whichare utilized for jointing bits designed to be employed for cutting thesides of flooring tongues are inclined, as indicated in Fig. 1, so as tobe capable of facing the sides of such bits, which are themselvesinclined to give clearance when in operation.

The manner of employing these stones for jointing purposes is to firstset the bar 55 to hold the stones in advance of the grinding wheel 30,then regulate the positions of the stones with respect to the bits bymoving the frame 21 in horizontal and vertical positions through themedium of the handwheels 15 and 24 To prevent the stones from beingexcessively moved, set collars 57 and 57 shown in Figs. 1 and 4, mayadvantageously be employed on the shaft 19 to limit the travel of theframe. In the jointing operations of both the knives and the hits, theturret is turned to have the head inthe position in which it isrepresented in Fig. 1 to be rotated by means of the belt 31 engaging thepulley 36 of the arbor upon which the head is mounted.

The sharpening and jointing of knives having cutting edges inclined fromthe axis of the head is effected by regulating the bar 36 to a"corresponding inclination, whence it is evident that the frame in beingreciprocated will be raised and lowered as the shoe 25 reciprocates onthe bar.

Where the jointing of knives with irregular or curved cutting edges, as59, with respect to the knives 5% of Fig. 8, is to be effected, a formeror templet 60 having an edge 60 similarly shaped to those ofthe knives,is'secured to the bracket 17 and, instead of a shoe 25, I use anattachment 61 with a sharp edge 61 to track on the edge 60 of thetemplet, whereby the free end of the frame 21 is suitably raised andlowered to correspondingly influence the grinding wheel 80 as ittraverses the orbital path of the knives while revolved.

In practice, the bits and knives are usually first sharpened andsubsequently jointed. lVhile the grinding wheel 80 is being used the bar55 is shoved back so as not to interfere, and to enable the frame 21 tobe freely moved, the collars 57 and 57 may have to be temporarilyloosened.

The operation of the invention will, it is thought, be understood fromthe foregoing description.

What I claim as my invention, is-

1. In a grinding machine of the class described, a tiltable frame, agrinding wheel, a spindle therefor journaled in said frame, means todrive said spindle to rotate the wheel, a bar adapted to serve as atrack element for the last named means, means for reciprocating saidframe, and means for adjusting the inclination of the track-bar toimpart selective vertical movements to the grinding wheel during thetravel of the same with said frame.

2. A grinding machine having in combination, a power driven grindingwheel arranged for axial movements, a carriage, means to reciprocatesaid carriage rectangular to the axis of said wheel, a turret rotatablymounted on said carriage, means to adjustably secure said-turret inselected rotary positions, a work-supporting arbor journaled in saidturret, gaging means engageable with the work for regulating the rotarypositions of the arbor and the work, and means to impart axial movementsto the grinding wheel to effect the grinding of the work.

3. A grinding machine having in combination, a grinding wheel, a spindletherefor arranged for vertical and axial movements, means to effect suchmovements of the spindle independently or together, means to drive thespindle, a reciprocatory carriage, a rotary support for the work, andmeans to secure said support in adjusted rotary positions.

4. In a grinding machine, the combination with the grinding wheel, areciprocatory carriage, and means to effect such movement of thecarriage, of a work-supportiug turret rotatably mounted on saidcarriage, said turret comprising a disk element having peripheral teeth,a post extending upwardly from said disk element, and a horizontallydisposed arbor journaled in said post for supporting the work, andadjust able means engaging the teeth of said disk element whereby theturret may be adjust ably secured in selected rotary positions.

5. In a grinding machine, the combination with the grinding wheel, meansto drive said grinding wheel, a reciprocatory carriage, and means toeffect such movement of the carriage, of a work-supporting turretrotatably mounted on said carriage, said turret comprising a diskelement having peripheral teeth, a post extending upwardly from saiddisk element, a horizontally disposed arbor journaled in said post forsupporting the work at one end thereof, means provided at the other endof the arbor and engageable with the aforesaid means for rotating thearbor, and adjustable means engaging the teeth of said disk elementwhereby the turret may be adjust-ably secured in selected rotarypositions.

6. In a grinding machine, a carriage, means to reciprocate saidcarriage, a workholding turret rotatably mounted on said carriage, saidturret having a disk element provided with spur teeth in its periphery,a rack-block, a spring serving to normally maintain the teeth of saidrack-block in engagement with selected teeth of said disk element, a rodrotatable in said rack-block, a swivel connection between the rod andthe carriage, screw-threads provided on said rod and engageable withthreads provided in said connection whereby rotary movements of the rodwill influence said rackblock to effect rotary movements of the turret,said rod also serving with said connection as a lever whereby therack-block may be disengaged from the teeth of said disk element inopposition to said spring.

7. In a grinding machine, a carriage, means to reciprocate saidcarriage, a workholder mounted on the carriage and including a rotaryarbor, a grindingwvheel, a spindle therefor, a frame in which saidspindle is journaled, manually actuated means for regulating themovements of said frame in directions axially of said spindle,adjustable means connected with said frame for regulating the elevationof the grinding wheel, means cooperating with the last named meanswhereby the elevation of said grinding wheel is controlled by themovements of the frame axially of the spindle, means to drive thespindle, and means provided on the arbor and engageable with saidspindle-driving means whereby the arbor may be rotated.

8. In a grinding machine, a work-holder having an arbor upon which thework is adapted to be detachably secured, a frame, a bar adjustablysecured against rotative movements in said frame, jointing devicessecured to said bar, means whereby the frame may be adjustably moved toregulate the horizontal and vertical positions of said jointing deviceswith respect to the work and means to drive said arbor for rotating thework and thereby render said devices operative to effect the jointing ofthe work.

9. In a grinding machine, a post, a horizontally disposed arbor carriedby the post for supporting a cutter-head, a quadrant rotatably connectedto said post having a recess in an arm thereof, means to secure thequadrant at selected rotary positions, a rod extending through saidquadrant, a gage-finger carried by the rod atone end thereof, a collarrigid with the rod and detachably seated in said recess, and a springconnecting an end of said collar with the post whereby the gage-fingeris yielldingly held through the medium of the roc.

10. In a grinding machine of the class described, a frame, a grindingwheel, a spindle therefor journaled in said frame, means to drive saidspindle to rotate the wheel, means to support the frame, means toreciprocate the wheel axially thereof through the medium of said frame,means compris ing a hinge connection at one side of the frame andadjustable devices at the opposite side thereof wherebythe frame may beaffected to adjust the elevation of said wheel, and an adjustable trackfor said devices whereby the elevation of the wheel may be controlledduring the reciprocatory movements thereof.

11. In a grinding machine, a base member, standards extending upwardlyfrom one end thereof, a bracket extending upwardly from near the otherend of said base member, a horizontal shaft journaled and movableaxially in said standards, a frame secured from one of its sides to saidshaft, a grinding wheel, a horizontal spindle provided for said wheeland journaled in the frameintermediate its width, means operable throughthe medium of said shaft and the frame to effect axial movements to'thewheel, means to rotate the wheel, an adj ustable bar provided on saidbracket, means carried by the frame at its side opposite to itsconnection with said shaft and supported by said bar whereby the framemay be tilted and cooperating with said bar to control the elevation ofthe wheel while being moved axially or otherwise.

12. In a grinding machine, the combination with the machine frame, awork-holding arbor, and means to drive said arbor for rotating the work,of a second frame connected to and supported by the machine frame,jointing devices carried thereby, means to impart reciprocatorymovements to the second-named frame, and adjustable means provided forthe'latter to limit the movements of the second-named frame to presentsaid. devices in positions to joint work which is rotated on the arbor.

Signed at Seattle, WVashington, March,

HARRY B. ROSS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, 20.0.

